Update leaderboard for model meta-llama/Meta-Llama-3-8B-Instruct (#46)

Update leaderboard for model meta-llama/Meta-Llama-3-8B (#45)

Update leaderboard for model meta-llama/Llama-2-13b-chat-hf (#20)

Update leaderboard for model meta-llama/Llama-2-13b-hf (#19)

Update leaderboard for model meta-llama/Llama-2-70b-chat-hf (#18)

Update leaderboard for model meta-llama/Llama-2-70b-hf (#16)

Upload meta-llama/Llama-2-7b-hf/results_leaderboard.json with huggingface_hub